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    Copyright (C) 2000-2007 Paul Davis 

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.


#ifndef __gtk_ardour_xfade_edit_h__
#define __gtk_ardour_xfade_edit_h__

#include <list>

#include <gtkmm/box.h>
#include <gtkmm/button.h>
#include <gtkmm/radiobutton.h>

#include <ardour/curve.h>
#include "ardour_dialog.h"
#include "canvas.h"

namespace ARDOUR
      class Session;
      class Curve;
      class Crossfade;

class CrossfadeEditor : public ArdourDialog
      CrossfadeEditor (ARDOUR::Session&, boost::shared_ptr<ARDOUR::Crossfade>, double miny, double maxy);
      ~CrossfadeEditor ();
      void apply ();
      static const double canvas_border;
      /* these are public so that a caller/subclass can make them do the right thing.
      Gtk::Button* cancel_button;
      Gtk::Button* ok_button;
      struct PresetPoint {
          double x;
          double y;
          PresetPoint (double a, double b) 
                : x (a), y (b) {}
      struct Preset : public list<PresetPoint> {
          const char* image_name;
          Preset (const char* x) : image_name (x) {}
      typedef list<Preset*> Presets;
      static Presets* fade_in_presets;
      static Presets* fade_out_presets;
      boost::shared_ptr<ARDOUR::Crossfade> xfade;
      ARDOUR::Session& session;
      Gtk::VBox vpacker;
      struct Point {
          ArdourCanvas::SimpleRect* box;
          ArdourCanvas::Line* curve;
          double x;
          double y;
          static const int32_t size;
          void move_to (double x, double y, double xfract, double yfract);
      struct PointSorter 
          bool operator() (const CrossfadeEditor::Point* a, const CrossfadeEditor::Point *b) {
                return a->x < b->x;
      ArdourCanvas::SimpleRect*   toplevel;
      ArdourCanvas::Canvas* canvas;
      struct Half {
          ArdourCanvas::Line*     line;
          ArdourCanvas::Polygon*  shading;
          list<Point*>            points;
          ARDOUR::Curve           normative_curve; /* 0 - 1.0, linear */
          ARDOUR::Curve           gain_curve;      /* 0 - 2.0, gain mapping */
          vector<ArdourCanvas::WaveView*>  waves;
      enum WhichFade {
            In = 0,
            Out = 1
      Half fade[2];
      WhichFade current;
      bool point_grabbed;
      vector<Gtk::Button*> fade_out_buttons;
      vector<Gtk::Button*> fade_in_buttons;

      Gtk::VBox vpacker2;

      Gtk::Button clear_button;
      Gtk::Button revert_button;

      Gtk::ToggleButton audition_both_button;
      Gtk::ToggleButton audition_left_dry_button;
      Gtk::ToggleButton audition_left_button;
      Gtk::ToggleButton audition_right_dry_button;
      Gtk::ToggleButton audition_right_button;

      Gtk::ToggleButton preroll_button;
      Gtk::ToggleButton postroll_button;

      Gtk::HBox roll_box;

      gint event_handler (GdkEvent*);

      bool canvas_event (GdkEvent* event);
      bool point_event (GdkEvent* event, Point*);
      bool curve_event (GdkEvent* event);

      void canvas_allocation (Gtk::Allocation&);
      void add_control_point (double x, double y);
      Point* make_point ();
      void redraw ();
      double effective_width () const { return canvas->get_allocation().get_width() - (2.0 * canvas_border); }
      double effective_height () const { return canvas->get_allocation().get_height() - (2.0 * canvas_border); }

      void clear ();
      void reset ();

      double miny;
      double maxy;

      Gtk::Table fade_in_table;
      Gtk::Table fade_out_table;

      void build_presets ();
      void apply_preset (Preset*);
      Gtk::RadioButton select_in_button;
      Gtk::RadioButton select_out_button;
      Gtk::HBox   curve_button_box;
      Gtk::HBox   audition_box;

      void curve_select_clicked (WhichFade);

      double x_coordinate (double& xfract) const;
      double y_coordinate (double& yfract) const;
      void set (const ARDOUR::Curve& alist, WhichFade);

      sigc::connection peaks_ready_connection;

      void make_waves (boost::shared_ptr<ARDOUR::AudioRegion>, WhichFade);
      void peaks_ready (boost::shared_ptr<ARDOUR::AudioRegion> r, WhichFade);
      void _apply_to (boost::shared_ptr<ARDOUR::Crossfade> xf);
      void setup (boost::shared_ptr<ARDOUR::Crossfade>);
      void cancel_audition ();
      void audition_state_changed (bool);
      enum Audition {
      void audition_toggled ();
      void audition_right_toggled ();
      void audition_right_dry_toggled ();
      void audition_left_toggled ();
      void audition_left_dry_toggled ();

      void audition (Audition);
      void audition_both ();
      void audition_left_dry ();
      void audition_left ();
      void audition_right_dry ();
      void audition_right ();

      void xfade_changed (ARDOUR::Change);

      void dump ();

#endif /* __gtk_ardour_xfade_edit_h__ */

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